Turn Off the Lights is a free browser extension developed by Stefan vd. It is available as a plugin for Microsoft Edge, Internet Explorer, Mozilla Firefox, Google Chrome, Opera, Safari, Maxthon and Yandex Browser. There is also a Turn Off the Lights bookmarklet for other browsers.

Turn Off the Lights is a browser extension that lets users dim everything on their screen except the Flash or HTML5 video they're watching, minimizing distractions and making for a more pleasant viewing experience for the internet users. A gray lamp icon is displayed in the browser menu bar when a video is detected; users click on the icon to make the screen surrounding the video fade. Clicking outside the video restores the rest of the screen. Users can adjust the opacity of the screen blocking and select a color other than black if desired. The extension can also be set to dim the screen automatically, and there are a variety of YouTube-specific features as well to bring an object to the front. A keyboard shortcut gives users quick access to the program's services.

ReceptionTurn Off the Lights has a 4.76-star rating at the Chrome extension web site with over 7458 reviews, and has been featured on Google Blog, Lifehacker, MacLife, CNET, and New York Times.Source: Wikipedia≡